This study was conducted to evaluate the changes occurring in the thickness of deep trunk muscles, measured using ultrasound imaging, after 4 wks of lumbosacral orthosis use in conjunction with routine physical therapy.
This parallel-group, randomized, controlled trial was conducted on 44 patients with nonspecific chronic low back pain, randomly allocated to the experimental and control groups. Both groups received eight sessions of physical therapy twice per week for 4 wks. The experimental group wore nonextensible lumbosacral orthosis, in addition to undergoing routine physical therapy. The thickness of the transversus abdominis, obliquus internus, and lumbar multifidus was measured by ultrasound before and after the 4-wk intervention.
The deep trunk muscles differed in thickness in various test positions. Four weeks of intervention with lumbosacral orthosis and routine physical therapy, however, did not change the thickness of the obliquus internus, transversus abdominis, and lumbar multifidus.
Wearing lumbosacral orthosis for an average of 7.21 hrs/d for 4 wks in conjunction with routine physical therapy did not affect the thickness of obliquus internus, transversus abdominis, and lumbar multifidus.
From the Department of Orthotics and Prosthetics, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran (FA, MK); Department of Physical Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran (IET, JS); School of Rehabilitation Sciences, Tehran Universities of Medical Sciences, Tehran, Iran (GK); and Biomechanics Laboratory, Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran (MP).
All correspondence should be addressed to: Ismail Ebrahimi Takamjani, PhD, Department of Physical Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Madadkaran Ave, Shahnazari St, Mohseni Square, Mirdamad Blvd, Tehran, Iran 15459-13487.
Aspen Medical Products, Inc, Irvine, CA, donated the lumbosacral orthoses that were used in this study. The funder had no role in the interpretation or reporting of the results.
Financial disclosure statements have been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article.
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Online date: January 16, 2019